What was the major influence of Alexander Graham Bell's 1876 invention/innovation? The completion of the Transcontinental Railroad contributed to the settlement of the West by-

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one of the main reasons was definitely slavery. back in 1861, republican abraham lincoln was elected and ended up being a major influence in the slavery business. slavery greatly affected the texas economy because back in 1845 during the annexation of texas, slaves became a big part of the texas population. many texans that were in favor of the secession influenced groups through party ties.